OpenSSL - SSL_write problem

I write a little HTTPS client in C and I have a problem with the SSL_write function. Three tests to illustrate my problem:

#define HEADERS1 "GET / HTTP/1.1\r\n"
#define HEADERS2 "Host: www.example.com\r\n"
#define HEADERS3 "User-Agent: OpenSSL\r\n"
#define HEADERS4 "\r\n"

#define HEADERS "GET / HTTP/1.1\r\nHost: www.example.com\r\nUser-Agent: OpenSSL\r\n\r\n"

Test 1:

SSL_write(ssl,HEADERS,strlen(HEADERS));

Success: The server correctly return the /index.html ressource with the HTTP/1.1 200 Code.

Test 2:

SSL_write(ssl,HEADERS1,strlen(HEADERS1));
SSL_write(ssl,HEADERS2,strlen(HEADERS2));
SSL_write(ssl,HEADERS3,strlen(HEADERS3));
SSL_write(ssl,HEADERS4,strlen(HEADERS4));

Failure: The server doesn't return anything. All SSL_write functions don't return ERROR but my application is locked on SSL_read because the destination server give no content... and no headers :(

Test 3:

SSL_write(ssl,HEADERS1,strlen(HEADERS1));
SSL_write(ssl,HEADERS2,strlen(HEADERS2));
SSL_write(ssl,HEADERS4,strlen(HEADERS4));

Success: The server correctly return the /index.html ressource with the HTTP/1.1 200 Cod开发者_开发百科e.

Is there a particular limitation on the number of times I can call SSL_write to send headers? Very strange...

Thanks you very much !

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Ok, so my problem persits but I have more details:

IISS-SSL => All tests success.

Apache-SSL => All tests success.

Nginx-SSL => All tests success.

LightHTTPD-SSL => Test 2 failure.

I don't understand why only LightHTTPD don't understand my request...

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For SSL_Write() operation, correct way should be after SSL_Write call , check on the message returned. If it is SSL_WANT_READ, then give some small amount of time for it to read.

Doing Continuous write operation with checking return value may be successful , but it is not safe, as you will not be sure of the data you wrote reached server and server read it completely.

This in turn may affect other SSL_write operations.